Allows for overriding any (overridable, of course) config option.

* feat(share-video) Allow sharing direct video links (mp4 etc) on mobile

* fix linting

* code review

- Fixed react native community slider to work on both android and ios
- Removed InviteButton from native menus
- Fixed buttons spacing in native OverflowMenu
- Participant context menu details are shown only for remote participants

Check whether context is that of an Activity before launching the Jitsi Conference Activity. If context is not an activity context, apply flag FLAG_ACTIVITY_NEW_TASK to the Jitsi Activity Intent to ensure activity can launch without error.

This scenario would manifest when a user attempts to launch the Jitsi Actvity from a Widget... for example.

https://developer.android.com/about/versions/pie/android-9.0-changes-all#fant-required

feat(external_api) exposes more events from JS to native and adds the ability to send actions from native to JS.

Fixes: https://github.com/jitsi/jitsi-meet/issues/8353

This may happen due to API misuse, but also in complex applications where
activity lifetimes are not straightforward.

The amplitude-js library gained React Native support so there is no need to keep
separate implementations.

Ref:
https://developer.android.com/reference/android/app/Activity#setVolumeControlStream(int)

Looks like audio devices must be re-set after focus was lost and regained.
Otherwise some devices (tested on a Samsung Galaxy S9) are in a weird state
where the second microphone is not used when speakerphone is on.

Co-authored-by: Saúl Ibarra Corretgé <saghul@jitsi.org>
Co-authored-by: zycwind <391321232@qq.com>

https://github.com/jitsi/jitsi-meet/issues/7911#issuecomment-714323255

Looks like the "Firebase Analytics" dependency is needed when migrating to the
new Firebase Crashlytics SDK. We are only interested in the "latest iversion
crash-free users" stat, which seems to require this. The documentartion is
somewhat confusing though.

JSC wasn't the cause for the crash we were hunting after all. RN doesn't set
HErmes as the default, neither does Expo, so the jury is still out on Hermes,
and it looks like JSC is still the safest bet.

In addition, the way Hermes is packaged (as a standalone AARs, instead of a
local "Maven repo") complicates the SDK build and can make the resulting build
bloated.